From 64d2a089d8936ea8574ea74b6b2d54c46606e7e2 Mon Sep 17 00:00:00 2001
From: Gabriel Wicke <gwicke@wikimedia.org>
Date: Wed, 11 Jul 2012 12:01:05 +0200
Subject: [PATCH] Make the parser service slightly more robust against
 serializer failures

Change-Id: I50624a56fd0319f6acb6fd1c171c7c6f92a97d31
---
 api/ParserService.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/api/ParserService.js b/api/ParserService.js
index fa3c570c87..19be682658 100644
--- a/api/ParserService.js
+++ b/api/ParserService.js
@@ -264,6 +264,9 @@ var roundTripDiff = function ( req, res, src, document ) {
 	res.write(document.body.innerHTML + '<hr>');
 	res.write( '<h2>HTML DOM converted back to Wikitext</h2><hr>' );
 	var out = new WikitextSerializer({env: env}).serializeDOM( document.body );
+	if ( out === undefined ) {
+		out = "An error occured in the WikitextSerializer, please check the log for information";
+	}
 	res.write('<pre>' + htmlSpecialChars( out ) + '</pre><hr>\n');
 	res.write( '<h2>Diff between original Wikitext (green) and round-tripped wikitext (red)</h2><hr>\n' );
 	var patch;